Slickdeals is community-supported.  We may get paid by brands for deals, including promoted items.
frontpageFrugie posted May 03, 2026 06:34 PM
frontpageFrugie posted May 03, 2026 06:34 PM

5-Qt Castrol GTX High Mileage 5W-20 Synthetic Blend Motor Oil

w/ S&S

$14

$24

41% off
Amazon
7 Comments 3,432 Views
Get Deal at Amazon
Good Deal
Save
Share
Deal Details
Amazon has 5-Quart Castrol GTX High Mileage 5W-20 Synthetic Blend Motor Oil on sale for $14.95 - $0.75 (5%) when you check out via Subscribe & Save = $14.20. Shipping is free with Prime or on $35+ orders.

Select Advance Auto Parts Stores also have 5-Quart Castrol GTX High Mileage 5W-20 Synthetic Blend Motor Oil on sale for $14.95. Select free store pickup where stock permits. [discuss]

Note: Availability for pickup will vary by location.

Thanks to community members Frugie & PhoTheNguyen85 for finding this deal.

Product Details:
  • Phosphorus Replacement Technology helps extend emission system life
  • Superior dispersancy that fights sludge build up
  • Exceptional oil burn-off protection exceeding industry standards* | Seal conditioners to help reduce leaks
  • Advanced additives that help prevent engine wear | Improved Fuel Economy**
  • Meets or exceeds the following specifications: API SP/SN PLUS/SN/SM | ILSAC GF-6 | Meets Ford WSS-M2C945-B1 | Meets Ford WSS-M2C960-A1 |* Based on API and ACEA volatility specifications | ** In 5W-20, 5W-30 and 10W-30 grades versus industry specifications

Editor's Notes

Written by johnny_miller | Staff
  • About this deal:
    • This price matches recent Frontpage Deals.
    • Please see the original post for additional deal ideas & give the forum comments a read for helpful discussion.
  • About this product:
    • Rated 4.8 out of 5 stars based on over 3.2k Amazon customer reviews.
  • About this store:

Original Post

Written by Frugie
Product Info
Community Notes
About the Poster
Deal Details
Product Info
Community Notes
About the Poster
Amazon has 5-Quart Castrol GTX High Mileage 5W-20 Synthetic Blend Motor Oil on sale for $14.95 - $0.75 (5%) when you check out via Subscribe & Save = $14.20. Shipping is free with Prime or on $35+ orders.

Select Advance Auto Parts Stores also have 5-Quart Castrol GTX High Mileage 5W-20 Synthetic Blend Motor Oil on sale for $14.95. Select free store pickup where stock permits. [discuss]

Note: Availability for pickup will vary by location.

Thanks to community members Frugie & PhoTheNguyen85 for finding this deal.

Product Details:
  • Phosphorus Replacement Technology helps extend emission system life
  • Superior dispersancy that fights sludge build up
  • Exceptional oil burn-off protection exceeding industry standards* | Seal conditioners to help reduce leaks
  • Advanced additives that help prevent engine wear | Improved Fuel Economy**
  • Meets or exceeds the following specifications: API SP/SN PLUS/SN/SM | ILSAC GF-6 | Meets Ford WSS-M2C945-B1 | Meets Ford WSS-M2C960-A1 |* Based on API and ACEA volatility specifications | ** In 5W-20, 5W-30 and 10W-30 grades versus industry specifications

Editor's Notes

Written by johnny_miller | Staff
  • About this deal:
    • This price matches recent Frontpage Deals.
    • Please see the original post for additional deal ideas & give the forum comments a read for helpful discussion.
  • About this product:
    • Rated 4.8 out of 5 stars based on over 3.2k Amazon customer reviews.
  • About this store:

Original Post

Written by Frugie

Community Voting

Deal Score
+21
Good Deal
Get Deal at Amazon

Price Intelligence

Model: Castrol GTX High Mileage 5W-20 Synthetic Blend Motor Oil, 5 Quarts

Deal History 

Sale Price
Slickdeal
  • $NaN
  • Today

Leave a Comment

Unregistered (You)

7 Comments

Sign up for a Slickdeals account to remove this ad.

May 03, 2026 11:14 PM
2,483 Posts
Joined Oct 2008
asukaMay 03, 2026 11:14 PM
2,483 Posts
Great for a syn blend. API SP. I'd use this in older cars with no turbo or timing chain.

But all my cars do today, so I use API SQ rated with as thick as I can get away with.
Yesterday 01:15 AM
345 Posts
Joined Jan 2013
EBGwdYesterday 01:15 AM
345 Posts
Quote from asuka :
Great for a syn blend. API SP. I'd use this in older cars with no turbo or timing chain. But all my cars do today, so I use API SQ rated with as thick as I can get away with.
Synblend... wonder what % is Synthetic. 2%? 20%? 40%?
Yesterday 02:12 AM
14 Posts
Joined Mar 2017
MacaraYesterday 02:12 AM
14 Posts
Great deal
Yesterday 02:37 PM
350 Posts
Joined Nov 2017
teknowerYesterday 02:37 PM
350 Posts

Our community has rated this post as helpful. If you agree, why not thank teknower

Just get Kirkland full synth from Costco. 2 pack is 30 bucks and is much better oil.
1
Yesterday 04:14 PM
1,077 Posts
Joined Nov 2012
darksiderisingYesterday 04:14 PM
1,077 Posts
Quote from EBGwd :
Synblend... wonder what % is Synthetic. 2%? 20%? 40%?
No way to know I believe. Love when terms like this are completely unregulated.
Yesterday 04:57 PM
2,483 Posts
Joined Oct 2008
asukaYesterday 04:57 PM
2,483 Posts
Quote from EBGwd :
Synblend... wonder what % is Synthetic. 2%? 20%? 40%?

The SP rating acts as a backstop there. Regardless it's very high quality. This is better performing than most full synthetics were required a decade ago.
Yesterday 10:03 PM
140 Posts
Joined Feb 2025
BraveMustang5764Yesterday 10:03 PM
140 Posts
Quote from teknower :
Just get Kirkland full synth from Costco. 2 pack is 30 bucks and is much better oil.
Link?

Leave a Comment

Unregistered (You)

Popular Deals

Trending Deals